[Qemu-devel] [PATCH] ppc: initialize GPRs as per epapr

[Bharat Bhushan]

ePAPR defines the initial values of cpu registers. This patch initialize
the GPRs as per ePAPR specification.

This resolves the issue of guest reboot/reset (guest hang on reboot).

Signed-off-by: Bharat Bhushan <address@hidden>
Signed-off-by: Stuart Yoder <address@hidden>
---
 hw/ppc/e500.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/hw/ppc/e500.c b/hw/ppc/e500.c
index c1bdb6b..a47f976 100644
--- a/hw/ppc/e500.c
+++ b/hw/ppc/e500.c
@@ -37,6 +37,7 @@
 #include "qemu/host-utils.h"
 #include "hw/pci-host/ppce500.h"
 
+#define EPAPR_MAGIC                (0x45504150)
 #define BINARY_DEVICE_TREE_FILE    "mpc8544ds.dtb"
 #define UIMAGE_LOAD_BASE           0
 #define DTC_LOAD_PAD               0x1800000
@@ -444,6 +445,12 @@ static void ppce500_cpu_reset(void *opaque)
     cs->halted = 0;
     env->gpr[1] = (16<<20) - 8;
     env->gpr[3] = bi->dt_base;
+    env->gpr[4] = 0;
+    env->gpr[5] = 0;
+    env->gpr[6] = EPAPR_MAGIC;
+    env->gpr[7] = (64 * 1024 * 1024);
+    env->gpr[8] = 0;
+    env->gpr[9] = 0;
     env->nip = bi->entry;
     mmubooke_create_initial_mapping(env);
 }
-- 
1.7.0.4